1 W single-transverse-mode Yb-doped double-cladfibre laser at 978 nm

Review on recent progress on Yb-doped fiber laser in a variety of oscillation spectral ranges

“…Special ring doping fiber was once used to perform spectral gain discrimination [20,21], which reduces the overlap of the laser field with the doped area, thus reducing gain at all wavelengths. A few watt level radiation was suc cessfully demonstrated since then [22][23][24][25][26][27]. However, this method has limitation in relatively small intrinsi cally single mode cores and the dimension of the pump core thus restricts the power scalability.…”

975-nm single-mode laser source: external coherent combining of two pigtailed laser diodes

“…The spectral response of the five-mirror device is obtained by replacing in (3) and by the complex reflectivities ( , ) of the Fabry-Pérot subcavities connected to the laser diodes 1 and 2 (5) where is the length of the Fabry-Pérot resonator, is the complex reflectivity of the output coupler , and is the complex reflectivity of the back mirror . According to (1), the spectral response of the new Michelson interferometer is given by This leads to the following expression for the spectral response of the "five-mirror resonator": Fig.…”

Fiber Design For High-Power Low-Cost Yb:Al-Doped Fiber Laser Operating at 980 nm

“…H IGH-POWER single-mode 980-nm lasers can be used for pumping of erbium-doped fiber amplifiers and lasers [1], [2], as well as for blue light generation by frequency doubling [3]- [5]. Commercially available single-mode 980-nm laser diodes are not only limited in output power but are expensive, too.…”